Add GitHub Actions CI workflows for code quality

[timurcarstensen]

Summary

This PR adds GitHub Actions workflows to enforce code quality standards across the project.

Changes

• Main CI workflow (.github/workflows/ci.yml)

  • Runs on pushes to main and pull requests
  • Tests against Python 3.8, 3.9, 3.10, and 3.11
  • Uses Ruff for both code formatting and linting
  • Includes YAML linting with yamllint
  • Includes shell script linting with ShellCheck
  • Type checking with mypy (non-blocking for now)

• Pre-commit workflow (.github/workflows/pre-commit.yml)

  • Automatically runs pre-commit hooks on pull requests
  • Ensures consistent code style before merging

• Ruff configuration in pyproject.toml

  • Line length set to 88 characters
  • Configured with common linting rules (pycodestyle, pyflakes, isort, etc.)
  • Consistent formatting preferences

• Pre-commit configuration (.pre-commit-config.yaml)

  • Standard file checks (trailing whitespace, EOF, large files, etc.)
  • Ruff for automatic fixing of linting issues
  • Mypy for type checking

Benefits

• Consistent code formatting across all contributions
• Early detection of common code issues
• Automated import sorting
• Type safety checks
• Protection against common file issues (large files, merge conflicts, etc.)

Testing

The workflows will run automatically once this PR is merged. Contributors can also run pre-commit install locally to get instant feedback before pushing.